Improvement in rotary harrows



sa ital tait/ra @anni (niita r Leners Patent No. 86,768, dated Febmwry9, 1869.

IMPROVEMENT IN ROTARY HARROWS.

The schedule referred m in time Letters Patent and making pm ofthe uma.

To all whom 'it may concern:

Be it known that we, SAMUEL LUBL'r and JACOB TROUT, of Lykehs, in thecounty of Dauphin, and State of Pennsylvania, have invented a new andimproved Rotary Harrow; and we do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the accompanying drawings, making apart of two harrows by means of gear-wheels affixed to thel sides ofthevertical wheel, and operating against a cog-rim at the inner or adjacentedges ofthe harrows, whereby the long shaft heretofore employed isdispensed with, and a different and better motion is im parted to thetwo harrows, and whereby the form and construction of the frame of theinstrument, and the various details of its several parts, can he greatlysim# plified, so as materially to reduce it in size and weight.

In the drawings, A A represent the two Vrevolving harrows, attached byvertical journals, or spindles, to a cross-bar, B, which is drawn alongby means of a tongue, O, the barrow being guided and controlled by meansof two handles, D D.

The cross-bar B is made in two parts, separated a few inches at thecentre of the machine, directly behind the tongue, the two parts beingconnected by an arched metallic yoke, E.

This arragementis for the purpose of accommodating a verticalspur-wheel, F, which rotates upon a short, stout shaft, havingitsbearings in lugs depending irom the under surface of the `cross-bar B,directly over the inner edge of the rims of the wheels A A'.

The rims of said wheels are, on their upper side and at their outeredge, provided with a row of cogs, r r, which gear with small pinions cc, attached to the shaft of wheel F, on each side oi' the latter, andclose t0 it, or attached tothe side of the wheel F itself.

Braces h h may be employed to strengthen the apparatus, and more innlyconnect the cross-beam and tongue.

The great advantage in this construction consists in dispensing with along shaft, and employing the short one, which carries wheel F, for thepurposes almve described. This enables the frame to be so simplified asto consistmerely of a single cross-beam, with a tongue tohaul it, andhandles to guide it, and, at the same time, it dispenses with thegreater part of the weight of the old` shaft.

There is another and very important advantage gained by arranging thegear-wheels e e at the inner edges of the cog-rim` lr, instead of at theouter edges, as heretofore, namely, tlvat, in the old Vinstrument, thewheel F, moving, at x, in a forward direction, caused the two harrows tomove, at z a, in the opposite direction. The consequence was that, whenthev latter caught a stick, stone, 85e., and movedit back, theobstructiouwas liable to meet the harrpwteeth moving forward, and tobreak either them or the teeth of the central wheel.

In our improved harrow, however, the teeth of wheel F, on its underside, move in the same direction as the teeth on the adjacent edges ofthe tvvodiai'rows, and any obstruction caught by one set of the teeth isimpelled to the rear by each of the othern sets also, instead of havingits progress resisted by the others.

Having thus described our invention,

What we claim as new, and desire to secure by Letters Patent, is-

l. The an'angement of the two horizontal rotary harrows A A,.veiticalwheel F, and two pinions e e, close at. the sides of the wheel F, andgearing with cog-rims on the wheels A A in such a manner that, as theinstrument is drawn forward, the under side of wheel F and the inneredges of wheels A A all move in one and the same direction.

2. The arrangement of the cross-beam EB, united, at the centre, by thearch E, the handles D D, the tongue C, and-the braces li h,substantially as and for the purpose above described.

Tothe above specification of our improvement, we have set our hands,this 12th day of October, 1868.

SAMUEL LUBOLT. JACOB TROUT. Witnesses:`

C. A. HARPER, H. B. GARDNER.

